EP 0411884 A1 19910206 - Novel photochromic spiropyran compounds.
Title (en)
Novel photochromic spiropyran compounds.
Title (de)
Photochrome Spiropyran-Verbindungen.
Title (fr)
Composés photochromiques de spiropyranne.
Publication
Application
Priority
JP 19898389 A 19890731
Abstract (en)
Novel photochromic spiropyran compounds having an absorption sensitivity in a longer wavelength region than known photochromic compounds are provided. The novel spiropyran compounds have a spiropyran skeleton having nitro groups at the 5 min and 6 positions, an alkyl group at the 1 min position and an alkanoyloxymethyl group at the 8 position.
IPC 1-7
IPC 8 full level
C07D 209/08 (2006.01); C07D 491/10 (2006.01); C07D 491/107 (2006.01); C09K 9/02 (2006.01); G03C 1/685 (2006.01); G11B 7/244 (2006.01)
CPC (source: EP)
C07D 209/08 (2013.01); C07D 491/10 (2013.01); G03C 1/685 (2013.01); G11B 7/244 (2013.01)
Citation (search report)
- [YD] EP 0179436 A2 19860430 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [Y] EP 0230024 A2 19870729 - MATSUSHITA ELECTRIC IND CO LTD [JP]
- [Y] DE 1922842 A1 19691204 - FUJI PHOTO FILM CO LTD
- [Y] DE 1769847 A1 19711111 - AMERICAN CYANAMID CO
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 0411884 A1 19910206; JP 2725391 B2 19980311; JP H0362883 A 19910318
DOCDB simple family (application)
EP 90308381 A 19900731; JP 19898389 A 19890731